I was on the last flight allowed into china during the SARS epidemic. The US airlines quit flying in the next day. I actually heard they were going to stop the flights and that my mission team could get a full refund if we decided not to go. Our Mission board sent me an email telling us to cancel. I saw the info line of the email and did not open it so I could claim ignorance. I was "willingly ignorant" of course.
My group was gungho and no one wanted to opt out.
We went and had a fruitful trip.
The flight over only had about 30 people. We each had a whole row to ourselves. Flight back? packed and a day later than planned.